How can I deliver and transform existing web images using Cloudinary?

In order to deliver and transform existing web images via Cloudinary, you can specify a remote HTTP URL as the 'file' parameter of our upload API. Cloudinary will automatically download the image from this remote URL and you will be able to transform it as you wish.

Comments

I'm mainly interested in your service for its on-the-fly resizing through the fetch method, but due to the nature of the app I'm creating, for security reasons, I'd be passing many temporary URLs through Cloudinary. I noticed that for each fetch -- even a fetch with the same image but a different query string -- a new image is stored in my Media Library and counted against my total storage count. I want images added to my library through fetch to expire after a certain period of time. Is this possible?